Plasmons in anisotropic quark-gluon plasma

Carrington, M. E.; Deja, Katarzyna; Mrówczyński, Stanisław

doi:10.1103/physrevc.90.034913

Cited by 33 publications

(71 citation statements)

References 29 publications

(113 reference statements)

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“…In order to compare the collective modes at different anisotropy , we have to make this parameter independent of ξ but of course the effects of different EOSs will be there in m D . While keeping the Debye mass intact with respect to ξ in both the isotropic as well as in the anisotropic case, we found the normalization constant(C ξ ) to be [29],…”

Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

“…Therefore, we can restrict our considerations to the spatial part of Π µν , denoted as Π ij and following the analysis done in [17,26,29], we have:…”

Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

“…To describe the anistropic hot QCD medium, we follow the approach of [17] and for the normalization of the momentum distribution function, we follow [29]. In these approaches, the anisotropic momentum distribution functions for the gluons and quark-antiquarks are done by rescaling (stretching and squeezing) of only one direction in momentum space function as:…”

Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

“…Our analysis, methodologically, is an adaptation of the works of Carrington, Deja and Mrówzyński [29] and Romatschke and Strickland [17]. We extended their formalism for interacting QGP equations of state where the medium effects are encoded in the momentum distribution of effective gluons and effective quarks employing a recently proposed quasi-particle model [27,28].…”

Section: Introductionmentioning

confidence: 99%

“…The momentum anisotropy, that develops at the cost of spatial anisotropy during the expansion of the system, is present throughout the hydrodynamical expansion of the QGP.Therefore, inclusion of such anisotropic effects while modeling the QGP is inevitable. The modeling of anisotropic distributions for the gluons and quarks in our case is based on [29], while genralizing the isotropic distributions obtained in [27,28].…”

Section: Introductionmentioning

confidence: 99%

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Collective excitations of hot QCD medium in a quasiparticle description

2017

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Collective excitations of a hot QCD medium are the main focus of the present article. The analysis is performed within semi-classical transport theory with isotropic and anisotropic momentum distribution functions for the gluonic and quark-antiquark degrees of freedom that constitutes the hot QCD plasma. The isotropic/equilibrium momentum distributions for gluons and quarks are based on a recent quasi-particle description of hot QCD equations of state. The anisotropic distributions are just the extensions of isotropic ones by stretching or squeezing them in one of the directions. The hot QCD medium effects in the model adopted here enter through the effective gluon and quark fugacities along with non-trivial dispersion relations leading to an effective QCD coupling constant. Interestingly, with these distribution functions the tensorial structure of the gluon polarization tensor in the medium turned out to be similar to the one for the non-interacting ultra-relativistic system of quarks/antiquarks and gluons . The interactions mainly modify the Debye mass parameter and , in turn, the effective coupling in the medium. These modifications have been seen to modify the collective modes of the hot QCD plasma in a significant way.

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Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

“…Therefore, we can restrict our considerations to the spatial part of Π µν , denoted as Π ij and following the analysis done in [17,26,29], we have:…”

Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

Section: B Extension To Anisotropic Hot Qcd Mediummentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Collective excitations of hot QCD medium in a quasiparticle description

2017

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The complex heavy-quark potential in an anisotropic quark-gluon plasma — Statics and dynamics

Dong

Yun

Islam

et al. 2022

J. High Energ. Phys.

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We generalize a complex heavy-quark potential model from an isotropic QCD plasma to an anisotropic one by replacing the Debye mass mD with an anisotropic screening mass depending on the quark pair alignment with respect to the direction of anisotropy. Such an angle-dependent mass is determined by matching the perturbative contributions in the potential model to the exact result obtained in the Hard-Thermal-Loop resummed perturbation theory. An advantage of the resulting potential model is that its angular dependence can be effectively described by using a set of angle-averaged screening masses as proposed in our previous work. Consequently, one could solve a one-dimensional Schrödinger equation with a potential model built by changing the anisotropic screening masses into the corresponding angle-averaged ones, and reproduce the full three-dimensional results for the binding energies and decay widths of low-lying quarkonium bound states to very high accuracy. Finally, turning to dynamics, we demonstrate that the one-dimensional effective potential can accurately describe the time evolution of the vacuum overlaps obtained using the full three-dimensional anisotropic potential. This includes the splitting of different p-wave polarizations.

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Optical properties of an anisotropic hot QCD medium

Jamal¹,

Mitra²,

Chandra³

2020

J. Phys. G: Nucl. Part. Phys.

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The present investigation involves explorations on the chromo-dielectric properties of the hot QCD medium produced in relativistic heavy-ion collisions in terms of refractive index. The isotropic/equilibrium modelling is done within an effective quasi-particle model of hot QCD medium. The possibilities of negative refraction in the medium are also explored in terms of the Depine–Lakhtakia index. The anisotropic aspects of the hot QCD medium are incorporated by introducing the anisotropy in a particular direction. That makes the medium quite similar to uniaxial crystals, and hence we observe the phenomenon of birefringence (two distinct refractive indices in the anisotropic case). Interestingly, both anisotropy and medium effects play significant roles in deciding the optical properties of the hot QCD/quark–gluon-plasma medium.

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Plasmons in anisotropic quark-gluon plasma

Cited by 33 publications

References 29 publications

Collective excitations of hot QCD medium in a quasiparticle description

Collective excitations of hot QCD medium in a quasiparticle description

The complex heavy-quark potential in an anisotropic quark-gluon plasma — Statics and dynamics

Optical properties of an anisotropic hot QCD medium

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